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How to define a function that can have multiple variables.

Asked by C Zeng on 11 Jun 2012

For example f(x,y,z) or f(x,y), z is optional. If I list three variables then system uses f(x,y,z), if only 2 variables uses f(x,y).

I know how to use it by nargin function, is there better way to do so?

Thanks.

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C Zeng

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1 Answer

Answer by the cyclist on 11 Jun 2012
Accepted answer

When you say you know how to do it by nargin, does that mean you are also familiar with varargin? That sounds like what you want.

>> doc varargin

There is an example on this page:

http://www.mathworks.com/help/techdoc/ref/varargin.html

3 Comments

C Zeng on 11 Jun 2012

Hi, thanks. Yes, I know how to do it by nargin, by writing a if nargin<3 command.

Could you write an example by using varragin?

Thank you!

the cyclist on 12 Jun 2012

I edited my reply to include a web page that has an example.

C Zeng on 12 Jun 2012

thank you!

the cyclist

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